function submitEmail( ) {
	var sEmail = $("email").value;
	
	if (sEmail.length > 0) {
		new Ajax.Updater(
			'Newsletter',
			'mailinglist.php', 
			{
				evalScripts:true,
				parameters:'email='+sEmail
			}
		);
	} else
		alert ('Please enter your email address');
}